Abstract: The presently disclosed subject matter relates to compositions, systems and methods of screening one or more species of polypeptide in a complex mixture of polypeptides, e.g., multi-subunit proteins. For example, the subject matter relates to ligands used in connection with affinity capillary electrophoresis, as well as methods and systems for detecting polypeptides in a mixture of multimers that include multispecific antibodies, e.g., bispecific antibodies.

Abstract: A firearm carrier that is design and configured to hold a firearm. In one embodiment, the firearm is a pump-action (or slide-action) firearm, such as a scattergun. The firearm can have a rear portion with a pistol grip, and a forward portion with a barrel and a pump-action (or slide-action) receiver. The firearm carrier can be secured to a user's waist and leg, and then the firearm can be removably secured to the firearm carrier. Advantageously, the firearm carrier is configured to receive a portion of the barrel of the firearm and can thus be secured to the firearm carrier. The firearm can also be rapidly removed from the firearm carrier should the user desire to remove the firearm from the firearm carrier.

Abstract: A firearm carrier that is design and configured to hold a firearm. In one embodiment, the firearm is a pump-action (or slide-action) firearm, such as a scattergun. The firearm can have a rear portion with a pistol grip, and a forward portion with a barrel and a pump-action (or slide-action) receiver. The firearm carrier can be secured to a user's waist and leg, and then the firearm can be removably secured to the firearm carrier. Advantageously, the firearm carrier is configured to receive a portion of the barrel of the firearm and can thus be secured to the firearm carrier. The firearm can also be rapidly removed from the firearm carrier should the user desire to remove the firearm from the firearm carrier.

Abstract: A firearm carrier that is design and configured to hold a firearm. In one embodiment, the firearm is a pump-action (or slide-action) firearm, such as a scattergun. The firearm can have a rear portion with a pistol grip, and a forward portion with a barrel and a pump-action (or slide-action) receiver. The firearm carrier can be secured to a user's waist and leg, and then the firearm can be removably secured to the firearm carrier. Advantageously, the firearm carrier is configured to receive a portion of the barrel of the firearm and can thus be secured to the firearm carrier. The firearm can also be rapidly removed from the firearm carrier should the user desire to remove the firearm from the firearm carrier.

Abstract: The presently disclosed subject matter relates to compositions, systems and methods of screening one or more species of polypeptide in a complex mixture of polypeptides, e.g., multi-subunit proteins. For example, the subject matter relates to ligands used in connection with affinity capillary electrophoresis, as well as methods and systems for detecting polypeptides in a mixture of multimers that include multispecific antibodies, e.g., bispecific antibodies.